Screening-chute for coal-pockets.



G. G. PFEIFFER.

SCREENING GHUTE FOR GOAL POGKETS.

APPLICATION FILED .TULY29, 1913.

1,125,709, Patented Jan. 19, 1915.

Imwwbor Mom M THE NORRIs PETFRS co, FHOTC-LITH(7.. WASHINGTON, D, C.

UNITED STATES PATENT ()FFICE.

CHARLES Gr. PFEIFFER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OFONE-HALF TO GEORGE W. PARKER, JR., OF PHILADELPHIA, PENNSYLVANIA.

SCREENING-CI-IUTE FOR COAL-POCKETS.

Specification of Letters Patent.

Patented Jan. 19, 1915.

Application filed July 29, 1913. Serial No. 781,709.

To all whom it may concern:

Be it known that I, CHARLES G. PFEIFFER,

of the city of Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented certain new and useful Improvements inScreening-Chutes for Coal-Pockets, whereof the following is aspecification, reference being had to the accompanying drawings.

The invention relates more particularly to screening chutes for coalpockets, with which is combined a dust pan, which is so related to thechute as to direct the screenings away from the wagon into which thechute is discharged.

An object of the invention is to provide a screening chute of the abovecharacter with a dust pan, which dust pan and screening chute may bereadily raised to inoperative position to permit the free passageunderneath the pocket of the wagon into which the coal is to bedischarged from the chute.

A further object of the invention is to provide means forcounterbalancing the screening chute and dust pan, so that they may bereadily raised to inoperative position.

These and other objects will be in part obvious. and will be in parthereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of theinvention, Figure I, is a sectional view through a coal pocket, showingmy improved screening chute and dust pan in side elevation, and inoperative position. Fig. II, is a similar View showing parts raised toinoperative position. Fig. III, is a detail in section of a small scaleshowing the manner of attaching the dust pan to the chute, and thesupporting arms therefor.

In the drawings I have shown the lower floor 1, of an ordinary coalpocket or receptacle, which is provided with an opening 2, through whichthe coal may be discharged. Directly beneath the opening 2, is aninclined floor indicated in dotted lines at 3, in Figs. I and II. A stop4, cooperates with the incline floor 3, and forms a discharge openingwhich is controlled by a pivoted gate 5, mounted to swing about a pivotpoint 6, and operated by a projecting arm 7. These parts are of theusual construction, and will not need further description.

Directly beneath the discharge opening is a pivoted screening chute 8.This screening chute is formed with side walls 9, which are preferablyimperforate and said chute has an opening extending from the point 10 tothe point 11, which opening is closed by the usual wire mesh screen 12.This wire mesh screen 12, is secured in the usual way to the chute. Saidchute is pivoted to turn about the pivot point 6, and may be supportedat its pivot point in any usual way. The upper end 13, of the chute iscut at an angle to the longitudinal axis of the chute, and when saidchute is in normal operative position. this inclined end rests againstthe lower face of the discharge chute of the pocket, so that the coalpassing from the discharge chute will enter said screening chute. Whenin this position the screening chute is at an angle to the floor 1. Thecoal passing therethrough will be delivered into the wagon 14, indicatedin dotted lines in Fig. I.

Attached to the lower end of the screening chute is a dust pan 15. Thisdust pan is U shaped in cross section, and the side walls are extendedto form arms l6. 16, which are adapted to rest upon supporting tracks18, respectively. Each track 18. is

carried by the frame structure of the coal pocket. and the movement ofthe rollers on the tracks is limited bv the supports 19, at one end ofthe track. The arms are pivoted at 20, to the lower end of the screeningchute.

The supports 19, for the tracks 18, are so related to the pivotal pointof the screening chute that when said screening chute is in operativeposition, as shown in Fig. I in the drawings, the rollers 17, engage thesupports, and the arms 16, serve as a means for supporting and holdingthe screening chute. These arms also serve to hold the dust pan inproper relation to the screening chute so that the screenings of thecoal passing through the screen will strike on the dust pan and bedischarged at one side of the wagon into which the screening chute isdischarging. The weight of the screenings on the dust pan will tend toturn the pan about the pivotal point 20, where it is connected with thescreening chute, and the rollers 17,

resting against the supports 19, will prevent any movement of the dustpan about its supporting pivot. From the above construction it will beapparent that, the supporting arms 16, serve to hold the screening chutein op erative position, and also to hold. the dust pan in properrelation to the screening chute.

In order to facilitate the raising of the, dust pan and the screeningchute, I have provided a counterbalance 21, which is carried by aflexible support 22, passing over supporting pulleys 23, and 24, andconnected to the lower end of the dust pan 15, at 25. Thiscounterbalance is so proportioned as to facilitate the raising of thescreening chute and dust pan, but permits said screening chute to remainin operative position. When it is desired to raise the screening chute,a slight forward pressure on the end of same will cause said screeningchute to swing about its pivotal support, and at the same time therollers 17, moving outward on the tracks 18, will cause the dust pan tobe brought up underneath the screening chute in the manner clearly shownin Fig. 11 of the drawing. This brings the screening chute and dust panup close underneath the coal pocket, and permits a free passage, so thata wagon or other device may be readily moved underneath the screeningpocket into position for receiving the coal. Afterbeing properlypositioned the screening chute may be readily brought to operativeposition. The counterbalance as above noted is so proportioned as toretain the screeningchute either in operative or inoperative position.

I It is obvious that minor changes in the details of construction may bemade without departing from the spirit of the invention asset forth inthe appended claims.

Having thus described my invention, 1 claim:

1. The combination of a receptacle having a discharge opening therein, ascreening chute pivoted to said receptacle and adapted to be turnedabout its pivot to inoperative position, a dust pan pivoted to saidchute adjacent its lower end and extending inan angle thereto underneathsaid screening chute, and means for supporting said chute in operativeposition and for holding the dust pan at an angle thereto, said meansincluding devices whereby said chute and dust pan may be swung abouttheir pivotal supports for raising the dust pan and screening chute toinoperative position.

2. The combination of a receptacle having a discharge opening therein, ascreenin chute pivoted to said receptacle and adapteil to be turnedabout its pivot to inoperative 0 position, a dust pan pivoted to saidchute adjacent its lower end and extending at an angle thereto, andsupporting arms for holding said dust pan at an angle to said chute andfor sustaining said chute in operative 5 position.

13. The combination of a receptacle having a discharge opening therein,a screening chute pivoted to said receptacle and adapted to be turnedabout its pivot to inoperative 7 position, a dust pan pivoted tosaidchute adjacent its lower end and extending at an angle thereto, andsupporting arms for holding said dust pan at an angle to said chute andfor sustaining said chute in operative position, a counterbalance andmeans for attachingsaid counterbalance to the lower end of said dustpan, whereby the weight of the dust pan and screening chute may becounterbalanced.

4. The combination of a receptacle having a discharge opening therein, ascreening chute pivoted to said receptacle and adapted to receive thedischarge therefrom, a dust pan pivoted to said screening chute'at apoint adjacent its lower end, and extending at an angle thereto, armsrigidly secured to said dust pan and projecting above said screeningchute, rollers carried by the upper ends of said arms, tracks on whichsaid rollers rest, stops'for limiting the movement of said rollers forholding said screening chute and dust pan in operative relation to eachother, and the receptacle.

5. The combination of a receptacle having a discharge opening therein, ascreening chute pivoted to said receptacle and adapted to receive thedischarge therefrom, a dust pan pivoted to said screening chute at apoint adjacent its lower end, and extending at an angle thereto, armsrigidly secured to said dust pan and projecting above said screeningchute, rollers carried by the upper ends of said arms, tracks on whichsaid roll- 7 ers rest, stops for limiting the movement of saidrollersfor holding said screening chute and dust pan in operativerelation to each other and the. receptacle, meansfor counterbalancingthe weight of said dust panv and screening chute, whereby the same maybe readily moved to inoperative position.

In testimony whereof, I have hereunto signed my name, at Philadelphia,Pennsyltwenty-eighth day of July 1918. CHARLES G. PFEIFFER. V Witnesses:

JAMEs H. BELL,

E. L. FULLnR'Toi Vania, this Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents,

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